EDITORIAL SKILL IN ENGLISH PUBLIPRENEUR-BASED LANGUAGE LEARNING (PBLL-Editing)
ELECTRICAL ENGINEERING MAJOR
FACULTY OF ENGINEERING
MUHAMMADIYAH UNIVERSITY TANGERANG (2022)
-----------
PLC
Programming Then & Now: The History of PLC’s
The
first PLC was introduced in the late 1960s.
A
programmable logic controller is an industrial computer. It is designed to help
in the control of manufacturing processes.
The
automobile sector was the first industry to deploy PLCs into its operations.
Their aim was to replace the hardwired relays and timers with programmable and
flexible controllers.
Since then, PLCs have been broadly adopted as the standard automation control system in discrete manufacturing industries.
Inception of PLC Programming
The
first PLC began being developed in 1968. General Motors designed a
specification for a ‘Standard Machine Controller’ and distributed it to vendors
for a quote. Some of the major elements of the specification included:
·
Should use solid state
components which should be modular and expandable
·
Should contain 16 units that
can be expanded to 256
·
Should have 16 outputs that
can be expanded to 128
·
Should offer easy programming
and reprogramming
·
Should not lose stored
programs during power outages, therefore, have at least 1k of memory that can
be expanded to 4k
This
device met all the requirements the Standard Machine Controller was asking for.
When the Modular Controller was tested in General Motors, it showed a 60
percent reduction in downtime.
Modicon PLC
Following
this success, Bedford Associates changed its name to Modicon PLC.They began
producing the Modicon 084, the first PLC.
What
differentiated the Modicon 084 from other products in the market was its
programming technique. The others were utilizing ‘Boolean Statements’ to
manipulate their equipment.
Boolean
algebra was by the Irish Mathematician George Boole and presented in The
Mathematical Analysis of Logic (1847). Boolean mathematics is the math of ones
and zeros, True and False. At it’s core, it consists of three expressions, AND,
OR and NOT. All computers use this type of logic.
Despite
the simplicity of Boolean Logic and The Genius of George Boole, Boolean
Statement programs were okay for computer scientists. However, plant engineers
found them difficult to work with, as compared to relay logic.
The
engineers were used to relay control systems which employed ladder diagrams.
This is because whenever relay circuits are drawn between a hot and neutral
common, they resemble the rungs of a ladder.
Morley’s genius idea was to incorporate ‘ladder logic’ into his system. Ladder Logic is essentially a graphic representation of Boolean Logic. This was the game changer. The engineers would find it easier to understand and use than Boolean Logic. Example of how Boolean can be expressed as Ladder Logic. (Source: http://e-class.teilar.gr/)
Process Description
A heating oven with two bays can heat one ingot in each back. When the heater is on it provides enough heat for two ingots. But, if only one ingot is present the oven may become too hot, so a fan is used to cool the oven when it passes a set temperature.
Control Description
If the
temperature is too high AND there is an ingot in only one bay, turn the fan on.
Define
Inputs and Outputs
B1 =
Bay 1 ingot present
B2 =
Bay 2 ingot present
F =
Fan
T =
Temperature sensor
By the
time the 70s were coming to a close, Allen-Bradley and other competitors had
developed systems that rivaled Modicon. Innovation started becoming key to
capturing market share.
PLCs
were becoming faster and more powerful. There was also the rapid evolving of
programming and documentation tools.
The
initial PLCs did not have a platform for program documentation. Thus, a program
had to be hand-written or drawn on a drafting board before it was entered
later.
This
is the period that saw to the development of the Data Highway by Allen-Bradley
and Modbus by Modicon. These innovations allowed PLCs to exchange information
with each other.
There
was also the development of programming terminals. These allowed programmers to
remotely enter logic programs. The final program could then be recorded on
cassette tape then downloaded to a PLC.
They could also generate printouts. This eliminated the need for the hand-drawings that consumed a lot of time.
The 1980s
The
‘80s saw the introduction of the first personal computers in offices. While you
can’t compare their speed to today’s computers, they were still a lot faster
than drawing on drafting boards.
In
fact, nearly every designer had replaced their drafting board with a desktop
computer by the time the 1980s were coming to a close.
The
adoption of personal computers was not relegated just to the design arena, but
also the shop floor.
The
PCs began being used to interface with PLCs directly. Coupled with software
improvements, this made monitoring machine motions a lot easier.
By
this period, the PLC program was widely recognized as the most useful
diagnostic tool. It allowed for effective troubleshooting, thus many
considering it to be the window to machines.
Nonetheless,
machine diagnostics were still in their primitive stages.
More powerful programing languages evolve
As PLC’s evolved, other programming languages were developed. These include flow charts, structured text, and instruction list. Nonetheless, ladder logic remains popular due to its graphical and intuitive design.
The Late 70s
Development of the IEC 61131-3
One of
the most significant milestones in PLC history was the introduction of the
International Electrotechnical Commission (IEC) 61131-3 specification in 1982.
It was
the standard by which PLC software being developed was to be held against. It
became published in 1993 as IEC 1131 International Standard for Programmable
Controllers.
The introduction of the IEC 61131-3 was necessary as it brought consistency to all the software products on the market. This allows engineers and technicians to easily understand logic and program flow from any PLC software.
The 1990s
As the
‘90s rolled in, end users began making special requests. They wanted their new
machinery to come with industrial terminals that had PLC monitoring software.
Plant
managers wanted their technicians doing actual troubleshooting. As such, the
PLC programs at that time were simple in design.
In an
attempt to save time, plant managers wanted to have machines that could tell
them what was amiss. Instead of spending hours troubleshooting.
This is what led to the development of the programmable human-machine interface (HMI).
Programmable Human Machine Interface
The
prototype HMIs were modest pushbutton replacers. However, they were thought to
be uneconomical for applications that had less than 20 pushbuttons.
Nonetheless,
their popularity started growing as manufacturers began finding more uses for
them.
Machine
monitoring information was becoming more and more vital.
This
included information such as machine problems, time in auto, manual
interventions, production counts, and more. All that was being monitored and
displayed in HMI screens then later sent to the factory’s central computers.
As the
1990s drew to an end, the logic controlling functions were just a slight part
of what a PLC program could do. This is because HMIs had so much data that
technicians hardly looked at program logic.
The
end of the ‘90s saw the introduction of a new generation of PLCs. These new
devices are what eventually brought internet connectivity to the factory floor.
Megabytes became the new standard for measuring processor memory. There was also the introduction of User-defined data types. These allowed for the manipulation and sharing of machine data in many ways.
PLCs Today
Since
the beginning, there has always been a need to reduce the size of the
automation systems so as to make support and maintenance simpler. This is why
we are witnessing the following trends in PLC technology:
Better, Smaller, and Faster
Circuit
boards, processors, and other electronic components are rapidly shrinking.
These improvements are influencing how PLCs are being designed.
However,
some things are affecting the acceptance of these changes. These include the
need for ruggedness, reliability, and stability.
Thus,
the most prevalent enhancement in the PLC industry is speed. This is enabled by
faster processors. They improve cycle time, have new communication features,
and enhanced memory capacity.
As the
market continues to make demands, a lot of functions and features traditionally
allocated to high-end PLCs are making their way to the lower-end products.
You
can, therefore, expect to see smaller PLCs spotting features associated with
top-tier machines. This allows for a smaller and more compact solution that
today’s users desire.
Memory Size
Today’s
PLCs are also taking advantage of the dramatically declining sizes and costs of
solid-state memory.
This
is allowing for enhanced local data storage. This enables PLCs to be used in a
lot of applications that traditionally required expensive data acquisition
systems.
This
feature also allows for additional utilities. This includes the ability to
store information on-board, thus expediting troubleshooting.
Memory Devices
Another
technology that is making its way to the industrial controls market are
portable memory devices. These devices are highly beneficial to the PLC user.
They provide you with massive amounts of extra storage in small packages. For example, a microSD card can add up to 32 GB of extra memory to the PLC.
The Merging of PLCs and PACs
Programmable
automation controllers (PACs) are hardened modular industrial controllers. They
often utilize a PC-based processor. This allows them to have more flexibility
and depth in programming.
For a
long time, suppliers in the industrial controls industry have been citing the
differences between PACs and PLCs.
However,
as PLC technology evolves, automation engineers cease to care about their
differences. Instead, they will start focusing on the performance and available
features. This will allow them to define their systems better.
PACs
and PLCs will continue merging as they evolve. As that happens, there are bound
to be opportunities in the market for both high and low-end processors.
As
hardware technology continues to evolve, advanced features will start being
incorporated into low-tier processors as well.
As a
result, manufacturers of the higher-end devices will be forced to include even
more options and features into their products.
Advanced Features
As
processors become faster and memories became even larger. It allowed a
floodgate of advanced features into the market. These included vision system
integration, motion control, as well as synchronized support for multiple
communication protocols. All that while maintaining the simplistic nature that
makes the PLC ideal to most consumers.
In the
period that PLC and PAC have been going head to head, we have witnessed a more
rapid development of both products.
PACs
are allowing their consumers to test the limits of what is regarded as
traditional industrial automation. This is forcing PACs manufacturers to
develop products that can meet those demands.
Thus,
product designers are having to come up with innovative designs. These sustain
the available components and build them into rugged systems. This allows them
to withstand the harsh industrial environment.
As
mentioned earlier, about half-a-century ago, the ladder diagram replaced
hardwired relay logic.
While
ladder logic made things simpler for engineers and technicians, it has some
drawbacks. Most notably, it is not efficient in data handling and process
control.
This
saw to the development of other industrial controller programming languages by
the IEC 6113. The standard covers the following:
· Structured Text
· Function Block
· Instruction List
· Sequential Function Charts
For
instance, sequential flow charts are better for process control. Structured
text is good for data manipulation.
Other
languages have their strong points as well. Nonetheless, the ladder diagram has
stayed on course through various advancements. It remains the most desired
language in PLC programming languages.
Connected Factory
The
most impactful change expected in the future of PLCs is their integration with
Enterprise Resource Planning. As well as synchronizing with other high-level
computing systems to the factory premises.
In the
past, extracting data and feeding it upstream to those systems was a major
integration task. However, future technologies are expected to have features,
functions, and hooks that allow for simplified integration.
The Rise of Industrial Ethernet and Industrial Internet of Things
The
industrial connectivity landscape has witnessed major changes. Industrial
Ethernet is now the network of choice on the factory floor.
An
industrial Ethernet network can handle larger amounts of data, and at faster
speeds. This makes it ideal for high-end and data-heavy applications that a PLC
typically contains.
Another
key reason for the adoption of industrial Ethernet is the recent development of
the Industrial Internet of Things.
IoT
allows manufacturers to connect all their equipment so they behave as a single
module. This is made possible by connectors and sensors.
They
are fitted to PLCs and other industrial devices to make data gathering more
efficient. This gives managers an excellent real-time view of what’s happening
on the floor, thus ensuring trouble areas are spotted as soon as they surface.
A. 5W1H Questions
Instruction
|
No |
WH |
Sentence Building (Question and Answer) |
|
1 |
Who |
Who was the first applied plc to his industrial operations ? |
|
Answer |
The automobile sector was the first industry to deploy PLCs into its operations |
|
|
2 |
Who |
Who was made boolean algebra ? |
|
Answer |
Boolean algebra was made by the Irish Mathematician George Boole and presented in The Mathematical Analysis of Logic (1847). |
|
|
3 |
What |
What is a programmable logic control ? |
|
Answer |
A programmable logic controller is an industrial computer. It is designed to help in the control of manufacturing process. |
|
|
4 |
What |
What is a ladder logic ? |
|
Answer |
Ladder Logic is essentially a graphic representation of Boolean Logic. |
|
|
5 |
Where |
Where was information being monitored and displayed in HMI screens sent ? |
|
Answer |
Information was being monitored and displayed in HMI screens then later sent to the factory’s central computers. |
|
|
6 |
Where |
Where is the place to draw or write the program on the intial plc before paltform for program documentaion unexisting ? |
|
Answer |
The initial PLCs did not have a platform for program documentation. Thus, a program had to be hand-written or drawn on a drafting board before program was entered late. |
|
|
7 |
Why |
Why did the initial PLC programs have to be handwritten or drawn on a drawing board before being entered ? |
|
Answer |
The initial PLC programs have to handwritten or drawn on a drawing board before being entered, because the intial PLC didn’t have a platform for program documentation. |
|
|
8 |
Why |
Why is Industrial Ethernet claimed as the network of choice on the factory floor ? |
|
Answer |
The industrial Ethernet network claimed as the network of choice on the factory floor because the industrial Ethernet can handle larger amounts of data, and at faster speeds. This makes it ideal for high-end and data-heavy applications that a PLC typically contains. |
|
|
9 |
When |
When was the first PLC introduced ? |
|
Answer |
The first PLC was introduced in the late 1960s. |
|
|
10 |
When |
When was the development of the IEC 61131-3 ? |
|
Answer |
The IEC 61131-3 was developed in 1982 |
|
|
11 |
How |
How to enter the program on the initial plc? |
|
Answer |
To enter the program on the Intial PLC can be done by hand-writing or drawing on a drafting board before it is entered later. |
|
|
12 |
How |
How can factory managers save time to identify machine problems? |
|
Answer |
Factory managers can save time to identify machine problem by developing programmable human-machine interface (HMI) development programs. |
A. B.Verbal and Nominal Sentences
|
No |
Sentences |
V |
|
01 |
Nonetheless, their popularity started growing as manufacturers began finding more uses for them. |
V |
|
02 |
They began producing the Modicon 084, the first PLC. |
V |
|
03 |
Morley’s genius idea was to incorporate ‘ladder logic’ into his system. |
V |
|
04 |
PACs are allowing their consumers to test the limits of what is regarded as traditional industrial automation |
V |
|
05 |
Richard E. Morley, who worked for Bedford associates, designed a device known as the Modular Digital Controller |
V |
|
06 |
Megabytes became the new standard for measuring processor memory |
V |
|
07 |
Today’s PLCs are also taking advantage of the dramatically declining sizes and costs of solid-state memory. |
V |
|
08 |
In fact, nearly every designer had replaced their drafting board with a computer by the time the 1980s where coming to a close. |
V |
|
09 |
These new devices are what eventually brought internet connectivity to the factory floor |
V |
|
10 |
Plant managers wanted their technicians doing actual troubleshooting. |
V |
2. Nominal Sentences
|
No |
Sentences |
N |
|
01 |
A programmable logic controller is an industrial computer. |
N |
|
02 |
Ladder Logic is essentially a graphic representation of Boolean Logic |
N |
|
03 |
Boolean mathematics is the math of ones and zeros, True and False |
N |
|
04 |
The automobile sector was the first industry to deploy PLCs into its operations |
N |
|
05 |
The prototype HMIs were modest pushbutton replacers. |
N |
|
06 |
Programmable automation controllers (PACs) are hardened modular industrial controllers. |
N |
|
07 |
Industrial Ethernet is now the network of choice on the factory floor. |
N |
|
08 |
Structured text is good for data manipulation |
N |
|
09 | Despite the simplicity of Boolean Logic and The Genius of George Boole, Boolean Statement programs were okay for computer scientists. |
N |
|
10 |
As the 1990s drew to an end, the logic controlling functions were just a slight part of what a PLC program could do. |
N |
. C. Active and Passive
Construction
|
No |
Sentences |
Active |
Passive |
|
01 |
Today’s PLCs are also taking advantage of the dramatically declining sizes and costs of solid-state memory |
✓ |
|
|
02 |
The size and cost of solid-state memory has decreased drastically currently utilized by PLCs |
|
✓ |
|
03 |
They began producing the Modicon 084, the first PLC |
✓ |
|
|
04 |
The first plc, Medicon 084 was started by them |
|
✓ |
|
05 |
Morley’s genius idea was to incorporate ‘ladder logic’ into his system |
✓ |
|
|
06 |
The 'ladder logic' in the system was incorporated by Morley's genius idea |
|
✓ |
|
07 |
PACs are allowing their consumers to test the limits of what is regarded as traditional industrial automation |
✓ |
|
|
08 |
The consumer-tested limits of what the traditional auto industry considers has allowed by PACs |
|
✓ |
|
09 |
Megabytes became the new standard for measuring processor memory |
✓ |
|
|
10 |
Processor memory is measured by a new standard that is Megabytes |
|
✓ |
D. List of Vocabulary
|
No |
Vocabulary |
Pronoun Spelling |
Meaning |
|
01 |
Produced |
Pruh.doost |
Diproduksi |
|
02 |
Adopted |
Uh.daap.tuhd |
Diadopsi |
|
03 |
Manufacturing |
Ėman(y)ÉĖfakCHÉriNG |
Manufaktur |
|
04 |
Sentence |
Ėsen(t)Éns |
Kalimat |
|
05 |
Start |
stƤrt |
Mulai |
|
06 |
Action |
ĖakSH(É)n |
Aksi |
|
07 |
Memory |
Ėmem(É)rÄ |
Memori |
|
08 |
System |
ĖsistÉm |
Sistem |
|
09 |
Ladder |
ĖladÉr |
Tangga |
|
10 |
Logic |
ĖlƤjik |
Logika |
|
No |
Senteces |
Indent |
|
1 |
General Motors(S) designed(verb2)a specification for a ‘Standard Machine Controller’(O) and distributed(Verb2) it to vendors for a quote(Omodify). |
Simple Past Tense |
|
2 |
Since then(adverb time), PLC’s(S) have been(to be) broadly adopted(verb3)as the standard automation control system(O) in discrete manufacturing industries(Omodify) |
Present Perfect Tense |
|
3 |
Richard E. Morley(S), who worked(Verb2) for Bedford associates(Smodify), designed(Verb2)a device known as the Modular Digital Controller(O) |
Simple Past Tense |
|
4 |
By the time the 70s(adverb time) were coming(verb.ing) to a close, Allen-Bradley(S) and other competitors(Smodify) had(to be) developed(Verb3) systems that rivaled Modicon(O) |
Past Perfect Tense |
|
5 |
This gives(Verb+S) managers(S) an excellent real-time view of what’s happening(Verb+ing)on the floor(O), thus ensuring(Verb+ing) trouble areas(Omodify) are spotted(Verb3) as soon as they surface. |
Past Continous Tense |
|
6 |
These new devices(S) are what eventually brought(Verb2) internet connectivity to the factory floor(O) |
Simple Past Tense |
|
7 |
For a long time(adverb time), suppliers(S) in the industrial controls industry(Omodif) have been(to be) citing(Verb+ing) the differences between PACs and PLCs(O) |
Present Perfect Continous Tense |
|
8 |
Today’s(adverbtime) PLC’s(S) are also taking(Verbing) advantage of the dramatically declining(verbing) sizes and costs of solid-state memory(O) |
Past Continous Tense |
|
9 |
In fact, nearly every designer(S) had(to be) replaced(Verb3) their drafting board(O) with a desktop computer(Omodify) by the time the 1980s(adverb time) were coming(Verbing) to a close. |
Past Perfect Tense |
|
10 |
This allows(Verb+s) engineers and technicians(S) to easily understand(verb1) logic and program(Omodify) flow from any PLC software(O). |
Simple Present Tense |
Translation into Indonesia
Please
translate the article into Indonesia
Pemrograman PLC Dulu & Sekarang: Sejarah PLC
PLC pertama diperkenalkan pada akhir 1960-an.
Pengontrol logika yang dapat diprogram adalah komputer industri. Ini dirancang untuk membantu dalam pengendalian proses manufaktur.
Sektor otomotif adalah industri pertama yang menerapkan PLC ke dalam operasinya. Tujuan mereka adalah mengganti relai dan pengatur waktu bawaan dengan pengontrol yang dapat diprogram dan fleksibel.
Sejak itu, PLC telah diadopsi secara luas sebagai sistem kontrol otomasi standar dalam industri manufaktur terpisah.
Pengenalan Pemrograman PLC
PLC pertama mulai dikembangkan pada tahun 1968. General Motors merancang spesifikasi untuk 'Pengontrol Mesin Standar' dan mendistribusikannya ke vendor untuk penawaran. Beberapa elemen utama dari spesifikasi termasuk:
Harus menggunakan komponen solid state yang harus modular dan dapat diperluas
Harus berisi 16 unit yang dapat diperluas menjadi 256
Seharusnya memiliki 16 keluaran yang dapat diperluas menjadi 128
Harus menawarkan pemrograman dan pemrograman ulang yang mudah
Tidak boleh kehilangan program yang disimpan selama listrik padam, oleh karena itu, miliki setidaknya 1k memori yang dapat diperluas hingga 4k.Richard E. Morley, yang bekerja untuk rekanan Bedford, merancang perangkat yang dikenal sebagai Pengontrol Digital Modular.
Perangkat ini memenuhi semua persyaratan yang diminta oleh Pengontrol Mesin Standar. Saat Kontroler Modular diuji di General Motors, ini menunjukkan pengurangan waktu henti hingga 60 persen.
Modikon PLC
Mengikuti kesuksesan ini, Bedford Associates berganti nama menjadi Modicon PLC. Mereka mulai memproduksi Modicon 084, PLC pertama.
Yang membedakan Modicon 084 dari produk lain di pasaran adalah teknik pemrogramannya. Yang lain memanfaatkan 'Pernyataan Boolean' untuk memanipulasi peralatan mereka.
Aljabar Boolean oleh matematikawan Irlandia George Boole dan disajikan dalam The Mathematical Analysis of Logic (1847). Matematika Boolean adalah matematika satu dan nol, Benar dan Salah. Pada intinya, ini terdiri dari tiga ekspresi, AND, OR dan NOT. Semua komputer menggunakan jenis logika ini.
Terlepas dari kesederhanaan Boolean Logic dan The Genius of George Boole, program Pernyataan Boolean baik-baik saja untuk ilmuwan komputer. Namun, insinyur pabrik merasa sulit untuk bekerja dengannya, dibandingkan dengan logika relai.
Para insinyur digunakan untuk menyampaikan sistem kontrol yang menggunakan diagram tangga. Hal ini karena setiap kali rangkaian relay ditarik antara common panas dan netral, mereka menyerupai anak tangga.Ide jenius Morley adalah memasukkan 'logika tangga' ke dalam sistemnya. Ladder Logic pada dasarnya adalah representasi grafis dari Boolean Logic. Ini adalah pengubah permainan. Para insinyur akan merasa lebih mudah untuk memahami dan menggunakan Logika Boolean. Contoh bagaimana Boolean dapat diekspresikan sebagai Ladder Logic. (Sumber: http://e-class.teilar.gr/)
Deskripsi proses
Oven pemanas dengan dua rongga dapat memanaskan satu ingot di setiap punggungnya. Saat pemanas menyala, panas yang cukup untuk dua ingot. Namun, jika hanya ada satu ingot, oven bisa menjadi terlalu panas, sehingga digunakan kipas angin untuk mendinginkan oven saat melewati suhu yang disetel.
Deskripsi Kontrol
Jika suhunya terlalu tinggi DAN hanya ada ingot di satu ruang, nyalakan kipas.
Tentukan Input dan Output
B1 = Bay 1 ingot hadir
B2 = Bay 2 ingot hadir
F = Kipas
T = Sensor suhu
Menjelang akhir tahun 70-an, Allen-Bradley dan pesaing lainnya telah mengembangkan sistem yang menyaingi Modicon. Inovasi mulai menjadi kunci untuk merebut pangsa pasar.
PLC menjadi lebih cepat dan lebih bertenaga. Ada juga alat pemrograman dan dokumentasi yang berkembang pesat.
PLC awal tidak memiliki platform untuk dokumentasi program. Jadi, sebuah program harus ditulis tangan atau digambar di papan gambar sebelum dimasukkan nanti.
Ini adalah periode yang melihat perkembangan Data Highway oleh Allen-Bradley dan Modbus oleh Modicon. Inovasi ini memungkinkan PLC untuk bertukar informasi satu sama lain.
Ada juga pengembangan terminal pemrograman. Ini memungkinkan pemrogram untuk memasukkan program logika dari jarak jauh. Program terakhir kemudian dapat direkam pada kaset kemudian diunduh ke PLC.
Mereka juga dapat menghasilkan cetakan. Ini menghilangkan kebutuhan akan gambar tangan yang menghabiskan banyak waktu.
1980-an
Tahun 80-an melihat pengenalan komputer pribadi pertama di kantor. Meskipun Anda tidak dapat membandingkan kecepatannya dengan komputer saat ini, kecepatannya masih jauh lebih cepat daripada menggambar di papan gambar.
Nyatanya, hampir setiap desainer telah mengganti papan gambar mereka dengan komputer desktop menjelang akhir tahun 1980-an.
Adopsi komputer pribadi tidak diturunkan hanya ke arena desain, tetapi juga lantai toko.PC mulai digunakan untuk berinteraksi dengan PLC secara langsung. Ditambah dengan peningkatan perangkat lunak, ini membuat pemantauan gerakan mesin jauh lebih mudah.
Pada periode ini, program PLC diakui secara luas sebagai alat diagnostik yang paling berguna. Itu memungkinkan pemecahan masalah yang efektif, sehingga banyak yang menganggapnya sebagai jendela ke mesin. Meskipun demikian, diagnostik mesin masih dalam tahap primitif.
Bahasa pemrograman yang lebih kuat berkembang
Seiring perkembangan PLC, bahasa pemrograman lain dikembangkan. Ini termasuk diagram alir, teks terstruktur, dan daftar instruksi. Meskipun demikian, logika tangga tetap populer karena desain grafis dan intuitifnya.
Akhir 70-an
Pengembangan IEC 61131-3
Salah satu tonggak terpenting dalam sejarah PLC adalah pengenalan spesifikasi International Electrotechnical Commission (IEC) 61131-3 pada tahun 1982.
Itu adalah standar di mana perangkat lunak PLC yang sedang dikembangkan harus dipegang. Itu diterbitkan pada tahun 1993 sebagai Standar Internasional IEC 1131 untuk Pengontrol yang Dapat Diprogram.
Pengenalan IEC 61131-3 diperlukan karena membawa konsistensi ke semua produk perangkat lunak di pasar. Ini memungkinkan para insinyur dan teknisi untuk dengan mudah memahami logika dan aliran program dari perangkat lunak PLC apa pun.
Tahun 1990-an
Saat tahun 90-an bergulir, pengguna akhir mulai membuat permintaan khusus. Mereka ingin mesin baru mereka hadir dengan terminal industri yang memiliki perangkat lunak pemantauan PLC.
Manajer pabrik menginginkan teknisi mereka melakukan pemecahan masalah yang sebenarnya. Dengan demikian, program PLC pada waktu itu sederhana dalam desain.
Dalam upaya menghemat waktu, manajer pabrik ingin memiliki mesin yang dapat memberi tahu mereka apa yang salah. Alih-alih menghabiskan berjam-jam pemecahan masalah.
Inilah yang menyebabkan pengembangan antarmuka manusia-mesin yang dapat diprogram (HMI).
Antarmuka Mesin Manusia yang Dapat Diprogram
Prototipe HMI adalah pengganti tombol tekan sederhana. Namun, mereka dianggap tidak ekonomis untuk aplikasi yang memiliki kurang dari 20 tombol tekan.
Meskipun demikian, popularitas mereka mulai meningkat karena produsen mulai menemukan lebih banyak kegunaan untuk mereka.
Informasi pemantauan mesin menjadi semakin penting.
Ini termasuk informasi seperti masalah mesin, waktu dalam otomatis, intervensi manual, jumlah produksi, dan banyak lagi. Semua itu dipantau dan ditampilkan di layar HMI kemudian dikirim ke komputer pusat pabrik.
Ketika tahun 1990-an berakhir, fungsi kontrol logika hanyalah sebagian kecil dari apa yang dapat dilakukan oleh program PLC. Ini karena HMI memiliki begitu banyak data sehingga teknisi sulit melihat logika program.
Akhir tahun 90-an menjadi saksi pengenalan generasi baru PLC. Perangkat baru inilah yang akhirnya membawa konektivitas internet ke lantai pabrik.
Megabita menjadi standar baru untuk mengukur memori prosesor. Ada juga pengenalan tipe data yang ditentukan pengguna. Ini memungkinkan manipulasi dan pembagian data mesin dalam banyak cara.
PLC Hari Ini
Sejak awal, selalu ada kebutuhan untuk mengurangi ukuran sistem otomasi agar dukungan dan pemeliharaan menjadi lebih sederhana. Inilah sebabnya kami menyaksikan tren berikut dalam teknologi PLC:
Lebih Baik, Lebih Kecil, dan Lebih Cepat
Papan sirkuit, prosesor, dan komponen elektronik lainnya menyusut dengan cepat. Perbaikan ini mempengaruhi bagaimana PLC sedang dirancang.
Namun, beberapa hal mempengaruhi penerimaan perubahan ini. Ini termasuk kebutuhan akan kekasaran, keandalan, dan stabilitas.
Dengan demikian, peningkatan yang paling umum dalam industri PLC adalah kecepatan. Ini diaktifkan oleh prosesor yang lebih cepat. Mereka meningkatkan waktu siklus, memiliki fitur komunikasi baru, dan meningkatkan kapasitas memori.
Karena pasar terus menuntut, banyak fungsi dan fitur yang secara tradisional dialokasikan untuk PLC kelas atas sedang menuju ke produk kelas bawah.
Oleh karena itu, Anda dapat mengharapkan untuk melihat fitur bercak PLC yang lebih kecil yang terkait dengan mesin tingkat atas. Ini memungkinkan solusi yang lebih kecil dan lebih ringkas yang diinginkan pengguna saat ini.
Ukuran memori
PLC saat ini juga memanfaatkan ukuran dan biaya memori solid-state yang menurun drastis.
Ini memungkinkan penyimpanan data lokal yang ditingkatkan. Hal ini memungkinkan PLC untuk digunakan dalam banyak aplikasi yang secara tradisional membutuhkan sistem akuisisi data yang mahal.
Fitur ini juga memungkinkan untuk utilitas tambahan. Ini termasuk kemampuan untuk menyimpan informasi on-board, sehingga mempercepat pemecahan masalah.
Perangkat Memori
Teknologi lain yang memasuki pasar kontrol industri adalah perangkat memori portabel. Perangkat ini sangat bermanfaat bagi pengguna PLC.
Mereka memberi Anda penyimpanan ekstra dalam jumlah besar dalam paket kecil. Misalnya, kartu microSD dapat menambah memori tambahan hingga 32 GB ke PLC.
Penggabungan PLC dan PAC
Pengontrol otomasi yang dapat diprogram (PAC) adalah pengontrol industri modular yang diperkeras. Mereka sering menggunakan prosesor berbasis PC. Ini memungkinkan mereka untuk memiliki lebih banyak fleksibilitas dan kedalaman dalam pemrograman.
Untuk waktu yang lama, pemasok di industri kontrol industri menyebutkan perbedaan antara PAC dan PLC.
Namun, seiring berkembangnya teknologi PLC, insinyur otomasi tidak lagi peduli dengan perbedaan mereka. Sebaliknya, mereka akan mulai berfokus pada performa dan fitur yang tersedia. Ini akan memungkinkan mereka untuk mendefinisikan sistem mereka dengan lebih baik.
PAC dan PLC akan terus bergabung seiring perkembangannya. Saat itu terjadi, pasti ada peluang di pasar untuk prosesor kelas atas dan kelas bawah.
Saat teknologi perangkat keras terus berkembang, fitur-fitur canggih juga akan mulai dimasukkan ke dalam prosesor tingkat rendah.
Akibatnya, produsen perangkat kelas atas akan dipaksa untuk memasukkan lebih banyak opsi dan fitur ke dalam produk mereka.
Fitur lanjutan
Saat prosesor menjadi lebih cepat dan memori menjadi lebih besar. Itu memungkinkan pintu masuk fitur-fitur canggih ke pasar. Ini termasuk integrasi sistem visi, kontrol gerak, serta dukungan tersinkronisasi untuk beberapa protokol komunikasi. Semua itu sambil mempertahankan sifat sederhana yang membuat PLC ideal bagi sebagian besar konsumen.
Selama PLC dan PAC saling berhadapan, kami telah menyaksikan perkembangan yang lebih pesat dari kedua produk tersebut.
PAC memungkinkan konsumen mereka untuk menguji batas dari apa yang dianggap sebagai otomasi industri tradisional. Hal ini memaksa produsen PAC untuk mengembangkan produk yang dapat memenuhi permintaan tersebut.
Dengan demikian, desainer produk harus menghasilkan desain yang inovatif. Ini mempertahankan komponen yang tersedia dan membangunnya menjadi sistem yang kokoh. Hal ini memungkinkan mereka untuk menahan lingkungan industri yang keras.
Tangga Logika Di Sini untuk Tetap
Seperti disebutkan sebelumnya, sekitar setengah abad yang lalu, diagram tangga menggantikan logika relai bawaan.
Sementara logika tangga membuat segalanya lebih sederhana bagi para insinyur dan teknisi, ia memiliki beberapa kelemahan. Terutama, itu tidak efisien dalam penanganan data dan kontrol proses.
Ini melihat perkembangan bahasa pemrograman pengontrol industri lainnya oleh IEC 6113. Standar tersebut mencakup hal-hal berikut:
- Logika Tangga
- Teks Terstruktur
- Blok Fungsi
- Daftar Instruksi
- Bagan Fungsi Berurutan
Misalnya, diagram alir berurutan lebih baik untuk kontrol proses. Teks terstruktur bagus untuk manipulasi data.
Bahasa lain juga memiliki kelebihannya. Meskipun demikian, diagram tangga tetap berada di jalurnya melalui berbagai kemajuan. Itu tetap menjadi bahasa yang paling diinginkan dalam bahasa pemrograman PLC.
Pabrik Terhubung
Perubahan paling berdampak yang diharapkan di masa depan PLC adalah integrasinya dengan Perencanaan Sumber Daya Perusahaan. Serta sinkronisasi dengan sistem komputasi tingkat tinggi lainnya ke lokasi pabrik.
Di masa lalu, mengekstraksi data dan memasukkannya ke hulu ke sistem tersebut merupakan tugas integrasi utama. Namun, teknologi masa depan diharapkan memiliki fitur, fungsi, dan pengait yang memungkinkan integrasi yang disederhanakan.
Bangkitnya Industrial Ethernet dan Industrial Internet of Things
Lanskap konektivitas industri telah menyaksikan perubahan besar. Industrial Ethernet sekarang menjadi jaringan pilihan di lantai pabrik.
Jaringan Ethernet industri dapat menangani jumlah data yang lebih besar, dan dengan kecepatan lebih cepat. Ini membuatnya ideal untuk aplikasi high-end dan data-heavy yang biasanya dimiliki oleh PLC.
Alasan utama lain untuk adopsi Ethernet industri adalah perkembangan terbaru dari Industrial Internet of Things.
IoT memungkinkan produsen untuk menghubungkan semua peralatan mereka sehingga berfungsi sebagai modul tunggal. Ini dimungkinkan oleh konektor dan sensor.
Mereka dipasang ke PLC dan perangkat industri lainnya untuk membuat pengumpulan data lebih efisien. Hal ini memberi manajer pandangan real-time yang sangat baik tentang apa yang terjadi di lapangan, sehingga memastikan area bermasalah segera terlihat setelah muncul.
Meaning Translation – penerjemahan
bermakna
Please sum-up the article by
explaining the reason why author use the tenses.
So after we read and also looked for the sentence patterns that
make up the article, we were able to find a lots of simple past tenses and past
continuous tenses sentences, so we can draw conclusions that the author wants
to tell or explain to the readers is about the history and development of PLCs
from time to time.
Lembar Simulasi
PRAKTIK MENYUNTING NASKAH
DALAM BAHASA INGGRIS
(PBLL-Editing)
Serahkan kumpulan portfolio
hasil belajar Bahasa Inggris pada saat UAS berupa: UTS, bahanPresentasi PPT
Kelompokdenganbukti-buktiberikut:
1. Lembar asli JawabanUjian
Tengah Semester (UTS), Idol, PPT kelompok
2. Bukti Perbaikan dalam
bentuk Terketik Rapi
3. Bukti Penerapan Simbol
Penyuntingan oleh Editor MitraBelajar di Kelas
4. Naskah Bersih hasil
suntingan Editor Mitra Belajar di Kelas
5. Lembar Bukti Penerapan
Hasil Penyuntingan
Catatan:
|
No |
PBLL-Approach |
Meeting |
Portofolios |
Learning Output |
Learning Outcome |
|
1. |
Prewriting |
1-8 (UTS) |
PPT Kelompok Idol Writing, Hasil UTS |
Insteand to be Self-Publisher (www.zalzulifa.com) |
Reading Writing Listening. Speaking about cicil engineering |
|
2. |
Drafting |
||||
|
3. |
Revising |
||||
|
4. |
Editing |
9-16 (UAS) |
Book Dummy (PPT Kelompok, Idol Writing, UAS) Individual Voice in Video |
Digital Publishing Member of www.polakata.com by registering to www.polakata.com/addacc.pkt |
|
|
5. |
Publishing |
||||
|
6. |
Marketing |
||||
|
7. |
Delivering |
|
INSTRUCTIONS |
||
|
1 1.Use the red ink pen to mark your editorial findings 2 2.Write the name of the manuscript’s writer within the box 3 3.Write your name as an editor within the editor’s box 4.Write the title of the manuscript 5 5.Treat the draft as an accepted manuscript to the Editorial Department. 6 6.Edit the manuscript by using the editorial signs 7 7.Put the number of your editorial findings (mechanical, substantive, pictorial) within the box right- side 8 8.Write your verbal verification of suggestion, comment, or input for the improvement of the manuscript. 9 9.Give your editorial judgment about the manuscript from the perspective of prewriting, drafting, revising, editing, publishing, marketing, and delivering) 10.Good Luck..be your best. |
||
|
Student's Identify |
Writer |
Editor |
|
Name |
Abdilah Nurfattah |
Ahmad Nur Wakhid |
|
Study Program |
Electrical Engineering |
Elektrikal Engineering |
|
Title of Manuscript |
PLC Programming Then & Now: The History of PLC’s |
|
|
No |
Editorial Findings |
Number |
Key Word |
C |
NC |
|
A |
Mechanical Editing |
|
|
|
|
|
Type |
1 |
- |
C |
|
|
|
Word |
2 |
- |
C |
|
|
|
Phrase |
3 |
- |
C |
|
|
|
Punctuations |
4 |
- |
C |
|
|
|
Comma |
5 |
- |
C |
|
|
|
Colon |
6 |
- |
C |
|
|
|
|
Semi Colon |
7 |
- |
C |
|
|
Preposition |
8 |
- |
C |
|
|
|
Dictions |
9 |
- |
C |
|
|
|
B |
Substantive Editing |
10 |
- |
C |
|
|
Content accuracy |
11 |
- |
C |
|
|
|
Language Consistency |
12 |
- |
C |
|
|
|
Message Originality |
13 |
- |
C |
|
|
|
Reader's Interest |
14 |
- |
C |
|
|
|
Coherence |
15 |
- |
C |
|
|
|
C |
Pictoral Editing |
16 |
- |
C |
|
|
Harmony |
17 |
- |
C |
|
|
|
Balancing |
18 |
- |
C |
|
|
|
White space |
19 |
- |
C |
|
|
|
Color |
20 |
- |
C |
|
|
|
Verbal Verification : i just veryfied that the writing of the article was good in choosing words and senteences but there were a few words and the placement of sentences which i personally thought were not quite right so tried to edit them with the help of editting symbols that had been provided by my lecturer. |
|||||
|
Editorial Judgement ; I think the editing of the script is good and quite thorough, and i just confirm that the editing of the script is almost perfect. |
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